Scaling reward value with demand curves versus preference tests

In Experiment 1, six capuchins lifted a weight during a 10-min session to receive a food piece. Across conditions, the weight was increased across six different amounts for three different food types. The number of food pieces obtained as a function of the weight lifted was fitted by a demand equation that is hypothesized to quantify food value. For most subjects, this analysis showed that the three food types differed little in value. In Experiment 2, these monkeys were given pairwise choices among these food types. In 13 of 18 comparisons, preferences at least equaled a 3-to-1 ratio; in seven comparisons, preference was absolute. There was no relation between values based on degree of preference versus values based on the demand equation. When choices in the present report were compared to similar data with these subjects from another study, between-study lability in preference emerged. This outcome contrasts with the finding in demand analysis that test–retest reliability is high. We attribute the unreliability and extreme assignment of value based on preference tests to high substitutability between foods. We suggest use of demand analysis instead of preference tests for studies that compare the values of different foods. A better strategy might be to avoid manipulating value by using different foods. Where possible, value should be manipulated by varying amounts of a single food type because, over an appropriate range, more food is consistently more valuable than less. Such an approach would be immune to problems in between-food substitutability.     

Profiles of Rater Dis/Agreement within Universal Screening in Predicting Distal Outcomes

Journal of Psychopathology and Behavioral Assessment - The success of a comprehensive and integrated school mental health system is dependent on data to inform decision-making. Universal screening...     

Sexual development and behavior in black preadolescents

As part of a longitudinal study of the sociosexual development of black preadolescents, sexual maturation and sociosexual behaviors were assessed and the relationships between these variables determined in a sample of 101 nine- to eleven-year-old middle- and low-income boys and girls. Sexual maturation was measured by Tanner's staging criteria of specific secondary sex characteristics. Involvement in heterosexual behaviors was elicited via self reports and was classified on a five-point heterosexual physical activity scale (HPA). The data corroborate other studies in demonstrating that girls were more advanced than boys in the process of sexual maturation. Considerable variation in stages of maturation for chronological age existed in both boys and girls, but was more pronounced for girls. In girls, there was no significant association between HPA and degree of biologic maturation. However, genital development in boys was significantly related to their sexual behavior. Income level was not significantly associated with the HPA score. A baseline from which to chart the progress of sociosexual behaviors in these developing preadolescents was established.     

Moving beyond the trait conceptualization of self-esteem: The prospective effect of impulsiveness, coping, and risky behavior engagement

Past research has largely focused on examining self-esteem as an independent as opposed to a dependent variable. At the same time, research suggests that during adolescence, self-esteem is subject to yearly, monthly, as well as daily change, and consequently, it is important to identify underlying vulnerability factors and behaviors, which shape self-esteem lability. In the current multi-wave, longitudinal study, 142 adolescents between the ages of 12-18 completed monthly assessments across 4 months. At the initial assessment, adolescents provided self-report data pertaining to impulsiveness, maladaptive coping, risky behavior engagement, and self-esteem. At each of the follow-up assessments, adolescents provided information about risky behavior engagement and self-esteem. Results of time-lagged, idiographic multilevel mediation analyzes indicated that risky behavior engagement mediated the relationship between impulsiveness/maladaptive coping and subsequent low self-esteem. Critically, when included in the same model, impulsiveness was significant above and beyond maladaptive coping. Additionally, the reverse model with self-esteem as the predictor and risky behavior included as the dependent variable was not significant suggesting that our effect was unidirectional. As a whole, these findings suggest that impulsive youth may engage in behaviors, which ultimately precipitate negative self-evaluations and transient declines in self-esteem.     

Justification magnets

The main message of Philosophy of Science after Feminism is twofold: that philosophy of science needs to locate science within its wider societal context, ceasing to analyze science as if it existed in a social/political/economic vacuum; and correlatively, that philosophy of science needs to aim for an understanding of scientific rationality that is appropriate to that context, a scientific rationality that integrates the ethical with the epistemic. The ideal of socially responsible science that the book puts forward, in fact, maintains that sound social values as well as sound epistemic values must control every aspect of the scientific research process, from the choice of research questions to the communication and application of results. And it is this that raises troubling questions for Matt Brown, Hugh Lacey, and Libby Potter. In this paper I attempt to answer their questions and make explicit exactly what is in the offing if I succeed.     

Book reviews

Gunnel Borgegard, Olav Fanuelsen, Christine Hall (ed.), The Ministry of the Deacon, 2. Ecclesiological Explorations (Uppsala: Nordic Ecumenical Council, 2000), 91–85564–10–9, 285 pp.

Dennis M. Doyle, Communion Ecclesiology (Maryknoll, New York: Orbis Books, 2000) 1–57075–327‐X, ix + 195 pp.

Nicholas M. Healy, Church, World and the Christian Life: Practical‐Prophetic Ecclesiology. Cambridge Studies in Christian Doctrine 7 (Cambridge: Cambridge University Press, 2000), 0–521–78650–9 (pbk), 199 pp.     

Naturalistic Experience and the Early Use of Symbolic Artifacts

Experience with a variety of symbolic artifacts has been proposed as a mechanism underlying symbolic development. In this study, the parents of 120 2-year-old children who participated in symbolic object retrieval tasks completed a questionnaire regarding their children's naturalistic experience with symbolic artifacts and activities. In separate regressions predicting children's use of video and pictures for information in experimental tasks, predictor variables such as children's exposure to live video and their emerging understanding of graphic representation were significant, even after accounting for the effects of children's vocabulary and birth order and parents' education and occupation. The results support the role of experience in children's early detection of symbolic relations.     

Evidence-Based Strategies Improve Assessment of Pediatric Bipolar Disorder by Community Practitioners

The misdiagnosis of pediatric bipolar disorder (PBD) has become a major public health concern. Would available evidence-based assessment (EBA) strategies help improve diagnostic accuracy, and are clinicians willing to consider these strategies in practice? The purpose of the present study was to document the extent to which using an EBA decision tool--a probability nomogram--improves the interpretation of family history and test data by clinicians and to examine the acceptability of the nomogram technique to clinicians. Over 600 clinicians across the US and Canada attending continuing education seminars were trained to use the nomogram. Participants estimated the probability that a youth in a clinical vignette had bipolar disorder, first using clinical judgment and then using the nomogram. Brief training of clinicians (less than 30 minutes) in using the nomogram for assessing PBD improved diagnostic accuracy, consistency, and agreement. The majority of clinicians endorsed using the nomogram in practice. EBA decision aids, such as the nomogram, may lead to a significant decrease in overdiagnosis and help clinicians detect true cases of PBD.     

Knowledge Transmission and the Internalism-Externalism Debate about Content

Philosophia - Sanford Goldberg (2015) argues for Content Externalism by drawing our attention to the extent to which an individual’s concepts depend on the concepts of others. More...